Dental Treatment in a Patient with CINCA Syndrome under General Anesthesia

이지민,송지수,현홍근,김영재,김정욱,장기택,이상훈,신터전,Lee, Ji Min,Song, Ji-Soo,Hyun, Hong-Keun,Kim, Young-Jae,Kim, Jung-Wook,Jang, Ki-Taeg,Lee, Sang-Hoon,Shin, Teo Jeon Korean Academy of Pediatric Dentistry 2018 大韓小兒齒科學會誌 Vol.45 No.1

Chronic infantile neurological cutaneous articular (CINCA) 증후군은 만성 염증성 질환으로, 주기적으로 발열을 일으킨다. 이 증후군의 환아들은 전신적인 염증으로 인해 치과적 문제에 노출되기 쉽다. 협조가 어려운 환자에 있어서 전신마취는 행동 조절 방법으로 널리 사용되어 왔으며, CINCA 증후군의 경우 전신적인 염증성 질환이기 때문에 전신마취를 시행할 때 있어 주의를 기울어야 한다. 본 증례 보고에서는 CINCA 증후군을 가진 비협조적 환아를 전신마취 하 치과 치료 시행한 증례보고와 함께 이러한 환아들에서 치과치료 전 고려사항을 고찰하고자 한다. Chronic infantile neurological cutaneous articular (CINCA) syndrome periodically causes fever along with inflammation in multiple organs. Patients with this condition are vulnerable to dental problems due to systemic inflammation. For uncooperative patients, general anesthesia has been widely used to control negative behavior. However, caution should be exercised when administering general anesthesia in these patients because this syndrome is pro-inflammatory. The present case report describes the clinical considerations of the dental treatment of an uncooperative child with CINCA syndrome who was treated under general anesthesia.

고경도 철계 장갑재의 미세조직과 기계적 특성 분석

이지민,한종주,송영범,함진희,김홍규,황병철,Lee, Ji-Min,Han, Jong-Ju,Song, Young-Beum,Ham, Jin-Hee,Kim, Hong-Kyu,Hwang, Byoungchul 한국재료학회 2018 한국재료학회지 Vol.28 No.8

This paper presents a study of the microstructure and mechanical properties of commercial high-hardness armor (HHA) steels tempered at different temperatures. Although the as-received specimens of all the steels exhibit a tempered martensite structure with lath type morphology, the A steel, which has the smallest carbon content, had the lowest hardness due to reduced solid solution hardening and larger lath thickness, irrespective of tempering conditions. As the tempering temperature increases, the hardness of the steels steadily decreases because dislocation density decreases and the lath thickness of martensite increases due to recovery and over-aging effects. When the variations in hardness plotted as a function of tempering temperature are compared with the hardness of the as-received specimens, it seems that the B steel, which has the highest yield and tensile strengths, is fabricated by quenching, while the other steels are fabricated by quenching and tempering. On the other hand, the impact properties of the steels are affected by specimen orientation and test temperature as well as microstructure. Based on these results, the effect of tempering on the microstructure and mechanical properties of commercial high-hardness armor steels is discussed.

정보이론을 이용한 농촌마을 권역화 연구

이지민,이정재,Lee, Ji-Min,Lee, Jeong-Jae 한국농공학회 2007 한국농공학회논문집 Vol.49 No.1

Classification results of rural villages provide useful information about rural village characteristics to select similar villages in rural development project; many researches about regional classification have been practiced. Recently rural amenity was introduced as an alternative for rural development, and rural villages have been surveyed to find potential resources for rural development by 'Rural Amenity Resources Survey Project'. Accumulated information through this survey project could be used to classify rural villages. However existing rural classification method using statistical data is not efficient method to use rural amenity resources information described with text. We introduced Information Bottleneck Method (IBM) based on information theory and implemented this method to classification with rural amenity resources information of Yanggang-myen, Yeongdong-gun in Chungbuk province.

오스템퍼링 시간에 따른 초고강도 나노 베이나이트강의 미세조직과 기계적 특성

이지민,황병철,Lee, Ji-Min,Hwang, Byoungchul 한국재료학회 2020 한국재료학회지 Vol.30 No.2

This study deals with the effects of austempering time on the microstructure and mechanical properties of ultra-high strength nanostructured bainitic steels with high carbon and silicon contents. The steels are composed of bainite, martensite and retained austenite by austempering and quenching. As the duration of austempering increases, the thickness of bainitic ferrite increases, but the thickness of retained austenite decreases. Some retained austenites with lower stability are more easily transformed to martensite during tensile testing, which has a detrimental effect on the elongation due to the brittleness of transformed martensite. With increasing austempering time, the hardness decreased and then remained stable because the transformation to nanostructured bainite compensates for the decrease in the volume fraction of martensite. Charpy impact test results indicated that increasing austempering time improved the impact toughness because the formation of brittle martensite was prevented by the decreased fraction and increased stability of retained austenite.

사마륨-코발트 자성 섬유 제조를 위한 환원 거동 연구 및 환원-확산 공정의 최적화

이지민,김종렬,좌용호,Lee, Jimin,Kim, Jongryoul,Choa, Yong-Ho 한국분말야금학회 2019 한국분말재료학회지 (KPMI) Vol.26 No.4

To meet the current demand in the fields of permanent magnets for achieving a high energy density, it is imperative to prepare nano-to-microscale rare-earth-based magnets with well-defined microstructures, controlled homogeneity, and magnetic characteristics via a bottom-up approach. Here, on the basis of a microstructural study and qualitative magnetic measurements, optimized reduction conditions for the preparation of nanostructured Sm-Co magnets are proposed, and the elucidation of the reduction-diffusion behavior in the binary phase system is clearly manifested. In addition, we have investigated the microstructural, crystallographic, and magnetic properties of the Sm-Co magnets prepared under different reduction conditions, that is, $H_2$ gas, calcium, and calcium hydride. This work provides a potential approach to prepare high-quality Sm-Co-based nanofibers, and moreover, it can be extended to the experimental design of other magnetic alloys.

인구 규모별 인구이동 특성과 인구이동률 네트워크 분석

이지민,Lee, Jimin 한국농촌계획학회 2018 농촌계획 Vol.24 No.3

In countries and regions population plays an important role. Recently the importance of population migration increased as population growth slowed. Researches on population migration are mainly focused on the analysis of the population movement factors and the regional structure analysis using the network analysis method. Analysis of regional structure through population movement is not enough to explain the phenomenon of migration of small cities and rural regions. In this study, to overcome the limit of previous studies the characteristics of the population movement rate according to the size of the population were analyzed. Also network analysis using the population movement OD (Origin and Destination) and population movement rate OD were conducted and the results of them were compared. As the results of analysis by the regional population scale, the population movement by population size showed a big difference in the areas with more than 100 thousand people and less than 100 thousand people. Migration to the outside of the province was the most frequent in regions with 30,000~50,000 people. The population migration rate network analysis result showed that the new area with large population inflow capacity was identified, which could not be found in the population movement network analysis because population movement number is small. The population movement rate irate is expected to be used to identify the central regions of the province and to analyze the difference in resident attractiveness.

한국산 복모류 (복모동물문)의 계통분류학적 연구

이지민,장천영,Lee, Ji-Min,Jang, Cheon-Yeong 한국통합생물학회 2004 Korean journal of biological sciences Vol.8 No.S

등온 열처리에 따른 중탄소 베이나이트강의 미세조직과 기계적 특성

이지민,이상인,임현석,황병철,Lee, Ji-Min,Lee, Sang-In,Lim, Hyeon-Seok,Hwang, Byoungchul 한국재료학회 2018 한국재료학회지 Vol.28 No.9

This study investigates the effects of isothermal holding temperature and time on the microstructure, hardness and Charpy impact properties of medium-carbon bainitic steel specimens. Medium-carbon steel specimens with different bainitic microstructures are fabricated by varying the isothermal conditions and their microstructures are characterized using OM, SEM and EBSD analysis. Hardness and Charpy impact tests are also performed to examine the correlation of microstructure and mechanical properties. The microstructural analysis results reveal that granular bainite, bainitic ferrite, lath martensite and retained austenite form differently in the specimens. The volume fraction of granular bainite and bainitic ferrite increases as the isothermal holding temperature increases, which decreases the hardness of specimens isothermally heat-treated at $300^{\circ}C$ or higher. The specimens isothermally heat-treated at $250^{\circ}C$ exhibit the highest hardness due to the formation of lath martensite, irrespective of isothermal holding time. The Charpy impact test results indicate that increasing isothermal holding time improves the impact toughness because of the increase in volume fraction of granular bainite and bainitic ferrite, which have a relatively soft microstructure compared to lath martensite for specimens isothermally heat-treated at $250^{\circ}C$ and $300^{\circ}C$.

Seismicity of the 2016 ML 5.8 Gyeongju earthquake and aftershocks in South Korea

이지민,류용규,박순천,Young Mo Ham,Jong Soo Park,김명수,Sang Mi Park,Hyen Geom Cho,Keun Su Lee,In Sun Kim,Hye Su Kim,Sunhee Bae 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.3

Since the modern seismograph network by the Korea Meteorological Administration (KMA) had been operated from 1978, the largest earthquake (ML 5.8) occurred in Gyeongju, South Korea on 12 September 2016. ML 5.1 and 5.8 earthquakes occurred successively and damaged mostly old building structures around Gyeongju. Aftershocks continued to occur, clustering around the epicenters of the two events. Number of observed aftershocks with ML ≥ 0.1 was 3,376 from 12 September 2016 to 31 March 2017 and these aftershocks were located by manual procedure. Since the origin time of the ML 5.8 earthquake, 339 and 672 aftershocks (ML ≥ 0.1) occurred on 12 and 13 September 2016, respectively. The occurrence rate of aftershocks decreased exponentially with time after 16 September. It is observed that the seismicity of the 2016 Gyeongju earthquake and aftershock sequences is dominant in the Yangsan Fault System. The distribution of aftershocks is NNE-SSW direction along the Yangsan Fault System, which agrees with the fault plane solutions of main shock and foreshock showing the strike-slip faulting. These aftershocks concentrate within the epicentral distance of 5 km from main shock and the depth distribution of aftershocks is mainly around 11–15 km with vertical trends. With regard to the seismicity of the 2016 Gyeongju earthquake’s aftershocks the full catalog with ML ≥ 1.2 based on Mc is suggested in this study. Finally the distribution of aftershock sequence correlated to the focal mechanisms can provide specific seismicity in the Gyeongsang Basin.

알쯔하이머형 치매 환자에서 행동심리증상과 호모시스테인과의 연관

이지민,임우영,김현,이강준,Lee, Ji Min,Im, Woo-Young,Kim, Hyun,Lee, Kang Joon 한국정신신체의학회 2014 정신신체의학 Vol.22 No.1

연구목적 호모시스테인은 인지기능의 손상과 다양한 정신과 증상들과 연관되어 있다. 본 연구는 혈중 호모시스테인 농도와 치매의 행동심리증상 사이에 연관성을 검증하기 위해서 시행되었다. 방법 DSM-IV에 의해 알쯔하이머형 치매로 진단된 환자 41명의 혈중 호모시스테인, 엽산, 비타민 $B_{12}$ 농도를 측정하였다. 그리고 병력청취, 신체검사와 간이정신상태기능검사(MMSE), 전반적 퇴화척도(GDS), 임상치매 평가척도(CDR), 한국형 신경정신행동검사(K-NPI)를 수행하였다. 결과 호모시스테인 농도와 NPI 총 점수 사이에 통계적으로 유의한 양의 상관관계가 관찰되었고 망상, 초조/공격성, 우울/불쾌, 들뜸/흥분과 같은 여러 하위항목과도 양의 상관관계가 관찰되었다. 호모시스테인 농도와 MMSE, GDS, CDR 점수 사이에는 유의한 상관관계가 관찰되지 않았다. 결론 본 연구는 혈중 호모시스테인 농도가 치매의 행동심리증상과 연관되어 있음을 보여준다. 추가적인 연구를 통하여 이와 연관된 병태생리학적 기전을 밝히는 것이 필요하다. Objectives : Homocysteine has been associated with cognitive impairment and various psychiatric symptoms. This study was designed to examine the relationship exists between plasma homocysteine concentration and behavioral and psychological symptoms of dementia(BPSD). Methods : 41 subjects with dementia of Alzheimer's type were included in this study. We carried out history taking, physical examination, and cognitive assessment for the diagnosis of dementia of Alzheimer's type based on DSM-IV. We scored the Mini Mental State Examination(MMSE), Global Deterioration Scale(GDS), Clinical Dementia Rating(CDR), and the Korean Neuropsychiatric Inventory(K-NPI). We also measured levels of homocysteine, folate, and vitamin $B_{12}$ in the plasma. Results : We found statistically significant positive correlations between homocysteine concentration with NPI total score, and with scores of several sub-domains such as delusion, agitation/aggression, depression/dysphoria, and elation/euphoria. No significant correlation existed between homocysteine levels and scores of MMSE, GDS, and CDR. Conclusions : This study shows that plasma homocysteine levels are associated with BPSD. Further research is necessary to identify pathophysiologic mechanisms underlying these relationships.